Boxberger (back) struck out the side in the seventh in his rehab appearance for Triple-A Durham against Columbus on Wednesday, Marc Topkin of the Tampa Bay Times reports.
The outing marked the second time that Boxberger has struck out the side in his minor-league rehab appearances, although the first occasion came against a lower level of competition while pitching for High-A Charlotte. The 29-year-old right-hander needed only 15 pitches to get through his one frame and will likely take the mound again by the weekend.